JP2883298B2 - Water dispersible sheet for tobacco and tobacco using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water dispersibility suitable for use as a filter wrapping paper (plug paper) covering a filter portion of a filter cigarette or a chip paper covering the outer periphery of the filter wrapping paper. The present invention relates to a sheet and tobacco using the same.

[0002]

2. Description of the Related Art Filter wrapping paper and chip paper used in the filter portion of a filter-made cigarette are required to have relatively low air permeability, opacity, smoothness, strength and the like. The air permeability should be relatively low, such that the air enters the filter wrapper or chip paper surface and does not excessively dilute tobacco smoke, with air permeability in the range of 200 Coresta or less. is there. For this reason, filter wrapping paper and chip paper have been manufactured using a pulp brand made of a tree species that has a high pulp beating degree or forms a sheet with low air permeability.

[0003] When the air permeability of the paper is reduced as described above, the water dispersibility of the paper deteriorates. Therefore, there is a problem in that the filter paper and chip paper of the discarded butts are not easily dispersed by rainwater or the like. there were. In order for filter paper and chip paper to be easily dispersed in rainwater or the like in a natural environment, the base paper used for these must have good water dispersibility.

A conventional water-soluble paper having water dispersibility is a paper obtained by mixing papermaking fiber and fibrous carboxymethylcellulose and adding an alkali metal compound (Japanese Patent Publication No. Sho 4).
3-1214, JP-B-43-28766, JP-B-48-
27604), in which water-insoluble or hardly water-soluble inorganic powder is mixed with papermaking fiber or carboxymethylcellulose (JP-A-3-8897, JP-A-3-180585), and alkali metal salts or alkaline earth metals of carboxymethylcellulose as raw materials. Compound containing salt (Japanese Unexamined Patent Publication No. 1-1689)
99, JP-A-3-167400, JP-A-6-18498
4), etc., but these conventional water-dispersed papers are not intended for applications requiring low air permeability, so that no consideration is given to air permeability and extremely high air permeability. It is. Normally, the permeability increases as the water-decomposability increases, so that conventionally, water-dispersed paper in which the permeability is regulated to a certain low level has not been obtained.

[0005] Generally, when the beating degree of wood pulp is reduced or the amount of filler is increased in order to improve the water disintegration property, the air permeability increases, and the paper is wound up with a filter. It cannot be used as paper or chip paper.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to regulate the air permeability to a certain level or less as a base paper suitable for filter wrapping paper and chip paper, and to improve water decomposability. The purpose of the present invention is to provide a water-dispersible sheet for tobacco which usually has conflicting properties.

[0007]

Means for Solving the Problems The present inventor has proposed that a water-dispersible fiber having a specific fiber dimension and water retention is used as a raw material for papermaking, various additives, alkali treatment, and a combination thereof are used. It is found that the water dispersibility is improved, and the air permeability is regulated by forming a water dispersible coating layer on the base material. In addition to the air permeability suitable for filter wrapping paper and chip paper, the water dispersibility is improved. The present invention has achieved the present invention.

The first invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
A water-dispersible coating layer made of a water-soluble polymer is provided on at least one surface of a water-disintegrable base material prepared using a papermaking fiber raw material containing 20% by weight or more of a water-dispersible fiber having a water retention of 95% or less. Air permeability of 200 Coresta or less with a paper air permeability manual measuring instrument or 0-5 with Oken type air permeability tester.
The present invention relates to a water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in a range of 0000 seconds / 100 ml.

[0009] The second invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
At least one surface of a water-decomposable base material obtained by mixing a water-insoluble or poorly water-soluble powder with a papermaking fiber material containing water-dispersible fibers having a water retention of 95% or less and 20% by weight or more is coated with a water-soluble polymer. Provided with a water-dispersible coating layer having a permeability of 200 Coresta or less with a paper air permeability manual measuring device or a gas permeability of 0 to 50,000 seconds / 100 ml with an Oken type air permeability tester. The present invention relates to a water-dispersible sheet for tobacco, characterized in that the sheet is regulated to be as follows.

[0010] The third invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
An aqueous dispersion comprising a water-soluble polymer is formed on at least one surface of a water-decomposable substrate obtained by forming a papermaking fiber material containing water-dispersible fibers having a water retention of 95% or less and containing 20% by weight or more and then performing an alkali impregnation process. A porous coating layer is provided, and the air permeability is adjusted so that the air permeability becomes 200 Coresta or less with a paper air permeability manual measuring device or the air permeability in the range of 0 to 50,000 seconds / 100 ml with an Oken-type air permeability tester. The present invention relates to a water-dispersible sheet for tobacco characterized by being regulated.

The fourth invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
At least one surface of a water-disintegrable base material obtained by mixing a water-insoluble or poorly water-soluble powder with a papermaking fiber material containing 20% by weight or more of a water-dispersible fiber having a water retention of 95% or less and alkali-impregnating the mixture. A water-dispersible coating layer composed of a water-soluble polymer was provided, and the air permeability was measured using a paper air permeability manual measurement device.
The present invention relates to a water-dispersible sheet for tobacco, which is regulated to have an air permeability in a range of 000 seconds / 100 ml.

The fifth invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
At least one surface of a water-disintegrable base material obtained by mixing a fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt with a papermaking fiber material containing 20% by weight or more of a water-dispersible fiber having a water retention of 95% or less, A water-dispersible coating layer made of a water-soluble polymer is provided, and the air permeability is measured using a paper air permeability manual measurement device at an air permeability of 200 Coresta or less or a Oken-type air permeability tester in the range of 0 to 50,000 seconds / 100 ml. The present invention relates to a water-dispersible sheet for tobacco, which is controlled to have an air permeability.

The sixth invention of the present application has a fiber dimension having an l / D value of 0.45 or less and an L / D value of 60 or less,
A water disintegration obtained by mixing a fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt with a water-insoluble or poorly water-soluble powder in a papermaking fiber raw material containing 20% by weight or more of a water-dispersible fiber having a water retention of 95% or less. A water-dispersible coating layer made of a water-soluble polymer is provided on at least one side of the water-soluble base material, and the air permeability of the water-soluble polymer is measured using a paper air permeability manual measuring device.
Air permeability less than 0 Coresta or 0 with Oken type air permeability tester
The present invention relates to a water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in a range of ５０50,000 seconds / 100 ml.

[0014] The seventh invention of the present application is directed to a water-disintegrable base material obtained by forming a papermaking fiber raw material containing water-dispersible fiber and fibrous carboxymethylcellulose or fibrous carboxyethylcellulose and then subjecting the raw material to alkali impregnation, A water-dispersible coating layer composed of a water-soluble polymer was provided, and the air permeability was measured using a paper air permeability manual measurement device at an air permeability of 200 Coresta or less or a Oken-type air permeability tester from 0 to 50,000 seconds / 10.
The present invention relates to a water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in a range of 0 ml.

The eighth invention of the present application is directed to a water dissolving method in which a water-insoluble or poorly water-soluble powder is mixed with a papermaking fiber raw material containing water-dispersible fiber and fibrous carboxymethylcellulose or fibrous carboxyethylcellulose, followed by alkali impregnation. A water-dispersible coating layer made of a water-soluble polymer is provided on at least one surface of the conductive base material, and the air permeability is measured with a paper air permeability manual measurement device using a gas permeability of 200 Coresta or less or an Oken-type air permeability tester. The present invention relates to a water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in a range of 0 to 50,000 seconds / 100 ml.

(Preparation of Water-Disintegrable Substrate) In the present invention, the water-dispersible fiber used for preparing the water-disintegrable substrate is
It is a fiber material having dispersibility in water essentially, and is generally used for papermaking. For example, it is selected from wood pulp fibers such as softwood kraft pulp, hardwood kraft pulp, and dissolved pulp, and non-wood-based plant fibers such as kenaf pulp, flax pulp, and linter. The average fiber length of the water-dispersible fiber is 0. 1-10mm,
Preferably 0.5 to 3 mm, more preferably 0.8 to 2
mm.

In particular, the first to sixth aspects of the present invention are characterized in that fibers having a specific fiber dimension and water retention when not beaten are used as the water-dispersible fibers. The fiber dimension is the length (L) of the fiber, the width (D) of the fiber, and the width (l) of the lumen of the fiber, which are measured by enlarging with an optical microscope or the like, and calculated according to the following equations (1) and (2). The value to be calculated. l / D = l ÷ D (1), L / D = L ÷ D (2)

[0018] The water retention is an index of the degree of swelling of pulp specified in JAPAN TAPPI No. 26, and indicates the proportion of moisture taken in and retained in the swollen fibers in the whole pulp. It is.

The water-dispersible fiber used in the first to sixth aspects of the present invention has an l / D value of 0.45 or less as a characteristic when not beaten.
The L / D value must be 60 or less and the water retention must be 95% or less. Like the water-dispersible fiber used in the first to sixth inventions, wood pulp fiber or non-wood pulp having an l / D value of 0.45 or less, an L / D value of 60 or less, and a water retention of 95% or less is used. Wood-based plant fibers are hardly swelled and crushed during the sheet forming process of papermaking, and the contact and bonding state between the fibers are unstable, so that the wood-based plant fibers are easily dispersed in water.

Since the fiber dimensions and water retention differ depending on the variety of the plant used as the raw material of the pulp, the l / D value,
In order to obtain L / D values and water retention in a specific range, pulp produced by selecting a specific plant variety is used. For example, woods such as the genus Quercus, Astragalus, Magnolia and Eucalyptus, and non-woody plants such as esparto grass can be exemplified. The pulp having the fiber dimensions and water retention in the above specific range is selected from commercially available pulp, or is obtained by mixing a plurality of pulp as needed.

The water-dispersible fibers used in the first to sixth aspects of the present invention are used after being dispersed in water or after beating. If the beating is advanced, the bonding between fibers increases, and the water decomposability and air permeability of the base material decrease.If the degree of beating is too high, the water dispersibility of the sheet becomes insufficient, and the degree of beating is too low. , The air permeability becomes too high or the strength becomes low. In the case of the first, third or fifth invention of this application, the Canadian freeness is 140 ml CSF to 650 ml CS
It is desirable to adjust F or the freeness of the shopper to fall within the range of 17 to 60 ° SR.

In the second, fourth or sixth aspect of the present invention, the water dispersibility of the sheet is improved by the addition of water-insoluble or hardly water-soluble powder. The beating degree can be made higher than that of the third or fifth invention, and the freeness in Canada is 60 mlC.
SF to 650 ml CSF, or 1 for shopper freeness
It is desirable to adjust so as to be in the range of 7 to 72 ° SR.

In the first to sixth aspects of the present invention, the water-dispersible fiber must be blended in an amount of 20% by weight or more based on the whole papermaking fiber raw material. The whole fiber material for papermaking may be occupied only by the water-dispersible fiber. When the mixing ratio of the water-dispersible fiber is less than 20% by weight, the water-dispersibility is greatly reduced.
In the first to sixth aspects of the present invention, when the blending amount of the water-dispersible fiber is less than 100% by weight of the papermaking fiber raw material, wood having a fiber dimension and water retention not in the above-mentioned ranges is used as the remaining papermaking fiber raw material. Pulp or non-wood based plant fibers can be incorporated up to 80% by weight.

In the second, fourth or sixth invention of the present application, a water-insoluble or hardly water-soluble powder is mixed when producing a water-decomposable substrate. By mixing a water-insoluble powder or a poorly water-soluble powder, water dispersibility and opacity can be increased. If the opacity is low, the filter medium of the tobacco filter part can be seen through and the appearance of the tobacco deteriorates, so that the opacity is increased, which is desirable for the use of filter wrapping paper and chip paper as the object of the present invention. is there.

In the second, fourth or sixth invention of the present application,
Non-metallic inorganics, metals, water-insoluble inorganic salts, thermosetting resin powders, thermoplastic resin powders, and the like are used as the water-insoluble powder to be mixed during production of the water-disintegrable base material. A poorly water-soluble inorganic salt is used. Specific examples of the water-insoluble powder are as follows, and may be used alone or in combination of two or more including water-insoluble powder. Metal oxides such as aluminum oxide and titanium dioxide. Silicon carbide,
Carbides such as boron carbide. Nitride such as trisilicon tetranitride and boron nitride. Silicate minerals such as mica, feldspar group, silica group, clay mineral, synthetic zeolite and natural zeolite. Titanate compounds such as potassium titanate and barium titanate;
Silicate compounds such as zinc silicate. Phosphate compounds such as zinc phosphate. Urea resin fine powder and styrene acrylic resin hollow resin fine powder.

Specific examples of the poorly water-soluble powder are as follows, and may be used alone or in combination of two or more, including the water-insoluble powder. Metal hydroxides such as aluminum hydroxide and magnesium hydroxide. Carbonate compounds such as calcium carbonate, barium carbonate, magnesium carbonate and zinc carbonate. Sulfate compounds such as barium sulfate, calcium sulfate and strontium sulfate.

These water-insoluble powders or sparingly water-soluble powders are added to the fiber material for papermaking and papermaking is carried out. It is desirable to adjust. If the amount of water-insoluble or poorly water-soluble powder contained in the sheet is less than 4% by weight,
The effect of improving the water dispersion and opacity is very small, and there is no point in adding. On the other hand, if the amount of the water-insoluble or poorly water-soluble powder exceeds 40% by weight, the water dispersibility and the opacity become extremely high, but the strength is greatly reduced, and the air permeability is significantly increased, so that the water permeability falls within the target air permeability range. Can not be regulated.

In consideration of runoff during the papermaking process, generally, when the powder is added to the papermaking fiber raw material, the ratio thereof is determined based on the water-insoluble or hardly water-soluble The powder is from 1 to 200, preferably from 5 to 100
If the content is selected from the range, the above content can be obtained.

In the third or fourth aspect of the present invention, the raw material is made into paper and then subjected to an alkali impregnation to obtain a water-decomposable base material. Since the water-dispersible fiber is easily swelled by an alkali, the sheet formed by forming the water-dispersible fiber and then impregnating with an alkali compound easily swells and disintegrates in water, thereby improving the water dispersibility. The alkaline compounds are listed below. Two or more alkaline compounds may be used as a mixture, but all of them must be water-soluble compounds. Alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. Alkali metal carbonates and bicarbonates such as sodium carbonate, potassium carbonate and sodium bicarbonate. Alkali metal phosphates and hydrogen phosphates such as sodium hydrogen phosphate; Organic acid salts of alkali metals such as sodium acetate. Hydroxides of alkaline earth metals such as calcium hydroxide. Amines such as ethanolamine.

The amount of impregnating these alkaline ^{compound, 0.05g / m 2 ~ 20g /} m 2, preferably from ^{0.1g / m 2 ~ 10g / m} 2, more preferably 0.
5 g / m ² to 5 g / m ² . Impregnation, after immersing the paper after paper making in an aqueous solution of the alkaline compound or a mixture of an aqueous organic solvent compatible with the aqueous solution,
A method of squeezing excess liquid with a pressure roll is preferable, and specifically, the method is carried out using a size press device or the like. Further, in order to prevent the alkaline compound from dropping off after drying, a water-soluble polymer compatible with the aqueous solution may be blended in the aqueous solution of the alkaline compound.

In the fifth or sixth aspect of the present invention, a fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt is added when producing a water-decomposable substrate. Since the fibrous carboxymethylcellulose salt or the fibrous carboxyethylcellulose salt swells and gels in water itself, the bond between these salts or between these salts and the fiber for papermaking is easily cleaved to form a sheet. Disperses rapidly in water.

The fibrous carboxymethylcellulose salt or fibrous carboxyethylcellulose salt includes sodium salt (CMC-Na, CEC-Na) and potassium salt (CM
CK, CEC-K), lithium salt (CMC-Li, C
An alkali metal salt such as EC-Li) or a mixed salt of the metal salt with an ammonium salt, an amine salt, a calcium salt, a magnesium salt, an aluminum salt, or the like may be used. The degree of etherification of the fibrous carboxymethylcellulose salt or the fibrous carboxyethylcellulose salt is 0.1 to 1.5, preferably 0.3 to 0.5. The compounding ratio of the fibrous carboxymethylcellulose salt or the fibrous carboxyethylcellulose salt is (fibrous carboxymethylcellulose salt or fibrous carboxyethylcellulose salt): (total papermaking fibers including water-dispersible fibers) = 1: 99 to 50:
50, preferably 3:97 to 15:85, more preferably 5:95 to 10:90.

In the seventh or eighth aspect of the present invention, the water-dispersible fiber does not need to use a fiber having a specific fiber dimension or water retention as in the first to sixth aspects. Wood pulp fibers such as softwood kraft pulp, hardwood kraft pulp, and dissolved pulp as water-dispersible fibers,
It can be appropriately selected and used from non-wood plant fibers such as kenaf pulp, flax pulp, and linter. The average fiber length is 0.1 to 10 mm, preferably 0.5 to 3 m
m, more preferably 0.8 to 2 mm. There is no limitation on the fiber dimension and water retention of the water-dispersible fiber in the seventh or eighth invention because the addition of fibrous carboxymethylcellulose or fibrous carboxyethylcellulose and alkali treatment provide sufficient water dispersion on the substrate. This is because the property is imparted.

In the seventh or eighth aspect of the present invention, it is necessary to form a highly impregnated sheet by reducing the degree of beating in order to uniformly perform the alkali treatment in the thickness direction of the sheet. So it is 140ml in Canada freeness
It is desirable to adjust the CSF to 720 ml CSF, or the Shopper freeness within the range of 14 to 60 ° SR.

In the seventh or eighth invention of the present application, fibrous carboxymethylcellulose or fibrous carboxyethylcellulose is blended as a fiber material for papermaking in addition to the water-dispersible fiber. This is the free CMC
-H and CEC-H, which do not have the swelling properties of fibrous carboxymethylcellulose salts and fibrous carboxyethylcellulose salts added to the base material in the inventions of the fifth and sixth aspects of the present invention, and which have a fiber shape even in water. It retains its shape and constitutes a fiber raw material for papermaking. In order to adjust the water dispersibility, 20% by weight or less of CMC-H or CEC-H can be replaced with a water-soluble or poorly water-soluble salt. For example, calcium salts (CMC-Ca, CEC-
Ca), zirconium salts (CMC-Zr, CEC-Z)
r), magnesium salt (CMC-Mg, CEC-M)
g), aluminum salts (CMC-Al, CEC-A)
1), zinc salts (CMC-Zn, CEC-Zn) and the like can be used, and two or more of these may be used in combination. The degree of etherification of fibrous carboxymethyl cellulose or fibrous carboxyethyl cellulose is 0.1 to 1.5,
Preferably it is 0.3-0.5. The beating degree of fibrous carboxymethylcellulose or fibrous carboxyethylcellulose is preferably from 300 ml CSF to 750 ml CSF.

In the seventh or eighth invention of the present application, the water-dispersible fiber is blended in an amount of 30 to 99% by weight of the whole raw material for papermaking. Fibrous carboxymethylcellulose or carboxyethylcellulose is used as the remaining papermaking fiber material, and semi-synthetic fibers, synthetic fibers, and inorganic fibers can be blended as necessary. The compounding ratio of the fibrous carboxymethylcellulose or fibrous carboxyethylcellulose is 1% by weight to 50% by weight of the whole fiber material for papermaking,
Preferably it is 3 to 20% by weight, more preferably 5 to 10% by weight. However, 20% by weight of semi-synthetic fiber, synthetic fiber, inorganic fiber, etc. to be blended as required.
The total amount of the water-dispersible fiber and the fibrous carboxymethylcellulose or carboxyethylcellulose is set to account for 80 to 100% by weight of the fiber material for papermaking.

The alkaline compounds used in the alkali impregnating treatment in the seventh and eighth aspects of the present invention are listed below, and two or more kinds thereof may be used as a mixture. Must be a compound. Alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. Alkali metal carbonates and bicarbonates such as sodium carbonate, potassium carbonate and sodium bicarbonate. Alkali metal phosphates and hydrogen phosphates such as sodium hydrogen phosphate; Hydroxides of alkaline earth metals such as calcium hydroxide. Amines such as ethanolamine and ammonia.
Borates such as borax. Silicates such as sodium silicate.

These are added to the base material after papermaking as an aqueous solution or a mixture of an aqueous organic solvent compatible with the aqueous solution. The amount of addition is not less than the neutralization equivalent obtained by converting fibrous carboxymethylcellulose (CMC-H) or fibrous carboxyethylcellulose (CEC-H) in the base material into a free acid, preferably from 1 to 1 of the neutralization equivalent. Double it. The method of adding to the base material is preferably a method of immersing the base material in an aqueous solution of the alkaline compound or a mixed solution of an aqueous organic solvent compatible with the aqueous solution, and then squeezing the excess liquid with a pressure roll. Specifically, this is performed using a size press device or the like.

In the first to eighth inventions of the present application, it is desirable that the water-disintegrable base materials prepared respectively have their freeness and basis weight adjusted so that the air permeability is 40,000 Coresta or less. If the air permeability of the water-disintegrable base material exceeds 40,000 Coresta, it becomes difficult to keep the air permeability of the coated paper within the regulated range of 200 Coresta or less even when the water dispersible coating layer is applied and super calendering is used in combination. . Water-disintegrable substrate has air permeability of 4
If it is less than or equal to 0000 Coresta, it is not particularly necessary to regulate the basis weight of the water-disintegrable base material in relation to the air permeability. , Preferably 15 g / m ^{2 to} 80 g
/ M ² , more preferably 25 g / m ^{2 to} 45 g / m ²
It is.

(Formation of water-dispersible coating layer)
The present invention is characterized in that a coating layer made of a water-soluble polymer is provided on one or both surfaces of each of the produced water-decomposable substrates. The reason for providing this coating layer is as follows. The water-disintegrable base material uses pulp fibers or the like in which the mutual contact and bonding state of the fibers are unstable in order to enhance the water dispersibility, or an additive for increasing the water dispersibility is added.
As a result, the water-disintegrable substrate becomes porous and has high air permeability. For this reason, it is necessary to regulate the air permeability in order to make the air permeability suitable for filter paper or chip paper for tobacco.

The following water-soluble polymers can be used alone or in combination of two or more. Starch such as potato starch and coast starch Starch derivatives such as oxidized starch, carboxymethylated starch, phosphate esterified starch, and hydroxyalkylated starch Cellulose derivatives such as carboxymethylcellulose salt, carboxyethylcellulose salt, methylcellulose, ethylcellulose, and hydroxyethylcellulose Alginate Plant synthetic polysaccharides such as, mannan, etc. Synthetic polymers such as polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxide-based polymers, polyacrylate polymers, etc. Plant mucous such as gum arabic, gum tragacanth, etc. Microbial mucilage such as dextran, levan Proteins such as casein, glue, gelatin, etc.Polyacrylate, polymethacrylate,
Emulsion of polyvinyl acetate copolymer

The coating layer is formed by applying a coating solution composed of a water-soluble polymer to one or both surfaces of the water-disintegrable base material using a roll coater or a blade coater. Penetrates into the base material to form a surface coating layer. If the air permeability of the coated sheet is 600 Coresta or less, the final air permeability can be adjusted to 200 Coresta or less by calendering or the like. Therefore, the coating is performed on one or both sides such that the air permeability after the coating is 600 Coresta or less. Amount of coating is, 0.1~30g / m ^2, preferably from 1 to 10 g / m ^2, more preferably 2 to 6 g / m ²
It is. After the application of the water-soluble polymer, calendering is performed if necessary.

In the first to eighth aspects of the present invention, the water-dispersible coating layer made of a water-soluble polymer provided on one or both sides of the water-disintegrable base material is based on 1 part by weight of the water-soluble polymer.
It may contain 20 parts by weight or less of water-insoluble powder or poorly water-soluble powder. When the water-dispersible coating layer composed of a water-soluble polymer contains a water-insoluble powder or a poorly water-soluble powder, there is an advantage that opacity and smoothness are increased and printability is improved.

The water-insoluble powder or the poorly water-soluble powder is the same as the powder added to the water-decomposable base material in the inventions of the second, fourth and sixth aspects of the present invention, and includes nonmetallic inorganic substances, metals and water. Insoluble inorganic salts, thermosetting resin powders, thermoplastic resin powders, or the like, or poorly water-soluble inorganic salts are used. Specific examples of the water-insoluble powder are as follows, and two or more kinds including the water-insoluble powder may be used alone. Metal oxides such as aluminum oxide and titanium dioxide. Silicon carbide,
Carbides such as boron carbide. Nitride such as trisilicon tetranitride and boron nitride. Silicate minerals such as mica, feldspar group, silica group, clay mineral, synthetic zeolite and natural zeolite. Titanate compounds such as potassium titanate and barium titanate;
Silicate compounds such as zinc silicate. Phosphate compounds such as zinc phosphate. Urea resin fine powder and styrene acrylic resin hollow resin fine powder.

Specific examples of the poorly water-soluble powder are as follows:
It may be used alone or in combination of two or more kinds including water-insoluble powder. Metal hydroxides such as aluminum hydroxide and magnesium hydroxide. Carbonate compounds such as calcium carbonate, barium carbonate, magnesium carbonate and zinc carbonate. Sulfate compounds such as barium sulfate, calcium sulfate and strontium sulfate. The mixing ratio of the water-soluble polymer and the water-insoluble or poorly water-soluble powder in the coating layer is 20 parts by weight or less, preferably 3 to 10 parts by weight of the water-insoluble or poorly water-soluble powder per 1 part by weight of the water-soluble polymer. Parts by weight. Even when these powders are contained, the coating amount is 0. 0 as in the case of only the water-soluble polymer.
1 to 30 g / m ^2, preferably from 1 to 10 g / m ^2, more preferably from 2 to 6 g / m ^2, after coating, smoothness, improved printability, calendar optionally including reduced air permeability Perform processing.

In the present invention, when a water-dispersible coating layer is formed on both surfaces of a water-disintegrable base material, a coating layer composed of only a water-soluble polymer is formed on both surfaces, or both surfaces are water-insoluble or hardly water-soluble. In addition to forming a coating layer containing powder,
A coating layer composed of only a water-soluble polymer may be formed on one surface, and a coating layer containing a water-insoluble or water-insoluble powder may be formed on the other surface.

Using the water-dispersible sheet for tobacco according to the present invention, the relationship between the air permeability measured by a paper air permeability manual measuring device and the Oken-type air permeability was measured. As a result, the following regression equation was obtained. Was. Air permeability = −0.418 × air permeability + 56.85 A region having low air permeability of 1 coresta or less needs to be measured by air permeability. From the above equation, the larger the numerical value, the more air permeability the air permeability Is low. According to the above regression equation, air permeability of 1 cholesta or less is air permeability of 133.6 seconds / 100 ml.
The air permeability cannot be measured when the air permeability is 133.6 seconds / 100 ml or more. When the air permeability is 56.85 Coresta or more, the air permeability cannot be measured, and the air permeability and the air permeability can be measured in the following ranges. Air permeability 56.85-1 Coresta Air permeability 0-133.6 sec / 100ml

The paper air permeability manual type measuring instrument is an air permeability measuring instrument manufactured by Filtroner Inc. and has a differential pressure of 100 mmH ₂ O.
Measure the flow rate of air passing through 1 cm ² of the sample at the time. The Oken-type air permeability tester measures the indicated value of a water column manometer when pressurized air passes through 10.75 cm ² of the sample, and the measured value is indicated in seconds / 100 ml.

The water-dispersible sheet for cigarettes according to the present invention is suitable for use as filter paper or chip paper for cigarettes. Filter wrapping paper as a tobacco material is a filter wrapping material for filtering tobacco smoke, mainly a sheet of cellulose acetate wrapped in a columnar shape.Tip paper is a filter paper made up of tobacco wrapped with tobacco wrapping paper. Is a piece of paper that joins the parts wound with filter paper. These materials must have various functions.

The first is control of air permeability. By opening the paper mechanically or by laser, or by increasing the air permeability of the paper itself, increase the inflow of air into the filter during smoking, dilute the concentration of tobacco smoke components such as tar and nicotine, and Can reduce the amount of smoke components. Various findings have been obtained regarding the relationship between the air permeability of paper and the degree of opening, and the amount of components in smoke, and the amount of components in smoke is controlled in the design and manufacture of tobacco products. With conventional water-soluble paper and water-disintegration technology, the air inflow is higher than the air permeability at the time of opening,
The paper itself has high air permeability, making it impossible to control the amount of tar and nicotine, and has a drawback in that it cannot differentiate products. By using the water-dispersible sheet of the present invention, the function of controlling the amount of components in smoke can be maintained.

The second is the printing aptitude required for the chip paper. By printing on chip paper, we are trying to differentiate tobacco products and improve product image.However, conventional water-soluble paper and paper made by water disintegration technology are porous and have low smoothness. So-called "through strike-through", in which the amount of surface ink decreases and the printing effect is weakened, and "swim" in which the ink becomes uneven on the printed surface,
Further, when performing printing such as gravure printing, phenomena such as an increase in the number of misdots, which is the number of points that could not be printed among the points to be printed, occur. However, in the present invention,
Since the surface is coated with a coating solution composed of a water-soluble polymer, the smoothness of the surface is improved, and the occurrence of the above-mentioned defects during printing can be suppressed.

By using the present invention, which is a sheet that satisfies these functions and is excellent in water dispersibility, it is possible to provide a cigarette in which the decomposition of a filter in a natural environment is promoted without losing commercial value. . To use the water dispersible sheet for tobacco according to the present invention as chip paper, gravure printing on the sheet as chip base paper,
A single color or multicolor printing of 2 to 5 colors is performed by flexographic printing or the like, a line pattern, a logo mark, a brand name of a cigarette or a cork pattern is applied, and the paper is cut into a predetermined width as chip paper. When used as a filter wrap, it is cut to a predetermined width as a filter wrap.

[0053]

In the first to sixth aspects of the present invention, since water-dispersible fibers having a specific fiber dimension and a specific water retention are used as a raw material of a papermaking base material, swelling and crushing occur during the sheet forming process during papermaking. It is difficult to perform the contact and bonding between the fibers, and a water-disintegrable base material that can be easily dispersed in water can be obtained.

In the second, fourth and sixth aspects of the present invention,
In preparing the water-disintegrable base material, water-insoluble or hardly water-soluble powder is mixed, so that the mutual contact of the fibers is hindered and the bonding state between the fibers becomes unstable. To obtain a water-disintegrable base material that is easily dispersed.

In the third and fourth inventions of the present application, the raw material is subjected to alkali impregnation after papermaking. Since the water-dispersible fiber is alkaline and easily swells, the substrate impregnated with the alkali swells the fiber in water, easily disintegrates, and improves the water dispersibility of the water-decomposable substrate.

In the fifth and sixth aspects of the present invention, since a swellable fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt is added during the production of a water-decomposable base material, they swell and gel in water, Since the fiber-to-fiber bonds between these salts and the papermaking fibers are easily broken, the water dispersibility of the base material is improved.

In the seventh and eighth aspects of the present invention, fibrous carboxymethylcellulose or fibrous carboxyethylcellulose is used as a part of the fiber material for papermaking, and after the papermaking, an alkali impregnation treatment is performed. as a result,
Since fibrous carboxymethylcellulose or fibrous carboxyethylcellulose forms the corresponding salts and becomes soluble and swellable in water, the fiber-to-fiber bonds between these salts and the papermaking fibers are easily cleaved to form a base. The water dispersibility of the material is improved. In the seventh and eighth inventions of the present application, fibrous carboxymethylcellulose or fibrous carboxyethylcellulose is dispersed and made in a state insoluble in water. Alternatively, as compared with the case where the fibrous carboxyethyl cellulose salt is dispersed and paper-made, the partially soluble portion of the salt is retained in the sheet without running off during paper-making, so that a substrate having higher water-dispersibility can be obtained.

In the following experimental examples, evaluation methods such as the water dispersion rate, water dispersion time, air permeability, and tensile strength were performed as follows. [Water dispersion rate] Ten test pieces of 2.5 cm square were prepared, water was measured using five of them, and the remaining five pieces were used as test pieces for measuring water dispersion rate. The converted absolute dry weight of the test piece is calculated from the water content using the following formula (I). Next, put 200 ml of deionized water in a 200 ml beaker, and stir with 60 ml.
While stirring at 0 rpm, the five test pieces are thrown in one after another. After stirring for a predetermined time, the content is separated by filtration through a standard sieve having an opening of 1.7 mm, dried at 105 ° C. for 5 hours or more, and the absolute dry weight is measured. The stirring time is 5 minutes or 20 minutes, and the water dispersion rate is determined from the following formula (II). The larger the water dispersibility, the better the water dispersibility. Converted absolute dry weight of test piece = Weight of test piece x dry weight of moisture measurement sample / air dried weight of moisture measurement sample ... (I) Water dispersion ratio = (equivalent dry weight of test piece-absolute dry weight of residue on sieve) test Piece-wise absolute dry weight × 100… (II)

[Water dispersion time] Five 3 cm square test pieces are prepared. Then 300m of deionized water in a 300ml beaker
and one of the test pieces is charged while stirring at 650 rpm with a stirrer. The time at which the test piece is cut into two or more pieces is determined with a stopwatch, and the average value of five measurements is taken as the water dispersion time. The shorter the water dispersion time, the better the water dispersibility. Water dispersion time was measured for all examples.

[Air Permeability] Using a manual air permeability meter (type: PPM100) manufactured by Filtroner, a differential pressure of 1
At 00 mm H ₂ O, the volume of air passing through 1 cm ² of the sample in one minute was measured. When the air permeability was lower than 1 Coresta, the air permeability was measured by an Oken-type air permeability tester (type: KG1 type) manufactured by Asahi Seiko Co., Ltd.

[Tensile strength] Measured according to JIS P8113.

Experimental Example 1 This experimental example shows that fibers having a specific fiber dimension and water retention are easily dispersed in water. The following four types of wood pulp having different fiber dimensions and water retention were procured. These are referred to as wood pulp A, B, C, D for convenience, and have the following characteristics when not beaten. Wood pulp A (softwood bleached kraft pulp) 1 / D value 0.722 L / D value 79.6 Water retention 103% Wood pulp B (hardwood bleached kraft pulp) 1 / D value 0.480 L / D value 44.2 Water retention 109% Wood pulp C (hardwood bleached kraft pulp) 1 / D value 0.420 L / D value 57.6 Water retention degree 77% Wood pulp D (hardwood bleached kraft pulp) 1 / D value 0.330 L / D Value 56.8 Water retention 93%

After beaten to a predetermined freeness with a beater described in JISP8210, another wood pulp beaten to the same or the same freeness is blended.
A hand-made paper having a basis weight of 27 g / m ² or 37 g / m ² was prepared according to the method described in the above. The water dispersing time of the handmade paper was measured, and those having less than 90 seconds were judged to be water dispersible, and the results are shown in Table 1.

From Table 1, it can be seen that A and B, in which the fiber dimension or water retention of the wood pulp does not fall within the specified ranges, have extremely long water dispersion times in the handmade papers produced independently. On the other hand, C and D having fiber dimensions and water retention within the specified ranges can be used alone or when the blending ratio is 20% by weight or more, wood pulp A
Also when it mix | blends with water dispersion time, it has very excellent water dispersibility.

[0065]

[Table 1]

Experimental Example 2 This experimental example shows that the addition of a water-insoluble or poorly water-soluble powder to wood pulp improves the water dispersibility of a paper-made substrate. Wood pulp A and C used in Experimental Example 1 were prepared, beaten and blended in the same manner as in Example 1. Calcium carbonate or calcium carbonate: titanium dioxide = 6 as water-insoluble or hardly soluble powder
1 was added to prepare a handmade paper having a basis weight of 27 g / m ² or 37 g / m ² . The water dispersibility was measured and is shown in Table 2.
The amount of water-insoluble or poorly water-soluble powder contained in paper is JIS
It was indicated by 900 ° C. ash of P8128.

In Table 2, the sample No. No. 20 is the sample No. No. 14 with calcium carbonate added, sample no. Sample No. 22 in Table 1 is sample No. 7 corresponds to the case where calcium carbonate is added, and it can be seen that the addition of water-insoluble or poorly water-soluble powder improves the water dispersibility.

[0068]

[Table 2]

Experimental Example 3 This experimental example shows that the water dispersibility of a paper-made base material is improved in accordance with the amount of water-insoluble or hardly water-soluble powder added to wood pulp. 40 parts by weight of the wood pulp A and 60 parts by weight of the wood pulp C used in Experimental Example 1 were all beaten to a freeness of 140 ml CSF and blended.
50, 100, 150 and 200 parts by weight of calcium carbonate were added to 100 parts by weight of this fiber raw material,
A water-disintegrable substrate having a basis weight of 27 g / m ² was prepared by hand according to JIS P8209, and the water dispersion time, water dispersion ratio, air permeability, and tensile strength were measured.

From Table 3, it can be seen that as the content of calcium carbonate in the water-disintegrable base material increases, the water dispersibility improves. However, when the content of calcium carbonate increases, the air permeability increases and the tensile strength tends to decrease. When the relationship between the calcium carbonate content and the tensile strength is extrapolated, the calcium carbonate content is 40% by weight or more. Since the tensile strength is estimated to be 0.5 kg or less,
Even in consideration of the improvement in strength due to the coating layer, the calcium carbonate content is desirably up to 40% by weight in practical use.

[0071]

[Table 3]

Experimental Example 4 This experimental example shows that by subjecting a substrate formed from wood pulp to alkali impregnation, the water dispersibility of the substrate is improved. 20 parts by weight of wood pulp A and 80 parts by weight of wood pulp C used in Experimental Example 1 were all beaten to a Canadian freeness of 450 ml CSF, and 100 parts by weight of calcium carbonate was added to 100 parts by weight of the fiber raw material.
Weight part added, basis weight 37g according to JIS P8209
/ M ² hand-made paper was prepared.

Next, sodium hydroxide and carboxymethylcellulose sodium salt for thickening were blended in the proportions shown in Table 4, and the solid content concentrations were 0.07, 0.7, and 5.89, respectively.
A weight percent alkali impregnating working fluid was prepared. After impregnating the handmade paper with the working fluid, the excess was squeezed and dried to produce an alkali-impregnated water-disintegrable substrate. With respect to the water-disintegrable base material, the water dispersion time and the pH of the 1% by weight dispersion were measured and are shown in Table 4.

From Table 4, it can be seen that as the amount of alkali attached increases, the water dispersion time becomes shorter and the water dispersibility is improved.

[0075]

[Table 4]

Experimental Example 5 This experimental example shows that the addition of a fibrous carboxymethylcellulose salt improves the water dispersibility. 40 parts by weight of wood pulp A and 60 parts by weight of wood pulp C used in Experimental Example 1 were all beaten and blended to a Canadian freeness of 600 ml CSF. Predetermined parts by weight of fibrous carboxymethylcellulose having a degree of etherification of 0.43 were blended with predetermined parts by weight of the wood pulp to prepare a fiber material for papermaking, and hand-pulled with a basis weight of 37 g / m ² according to JIS P8209. Table 5 shows the results of preparing paper and measuring the water dispersion in the same manner as in Experimental Example 1. Table 5 shows that the blending of the fibrous carboxymethylcellulose sodium salt improves the water dispersibility. The air permeability is also in a range that can be regulated to a predetermined value by forming a coating layer or calendering.

[0077]

[Table 5]

Experimental Example 6 In the seventh and eighth aspects of the present invention, there is no limitation on the fiber dimension and water retention of the water-dispersible fiber. In this experimental example, when mixing with fibrous carboxymethylcellulose or fibrous carboxyethylcellulose in water-dispersible fibers and then performing alkali impregnation, the fiber dimensions and water retention of the water-dispersible fibers are as described in the first to sixth aspects of the present application. This shows that a water-disintegrable base material having good water dispersibility can be obtained even if it is not in a specific range as in the invention.

Wood pulp A and wood pulp C used in Experimental Example 1 were prepared as water-dispersible fibers. These are JI
After beaten to a predetermined freeness with a beater described in SP8210, a predetermined part by weight of fibrous carboxymethylcellulose having a degree of etherification of 0.43 was blended with each part by weight in Table 6 to prepare a papermaking fiber. A hand-made paper was prepared according to JIS P8210. The handmade paper was immersed in a 5% aqueous solution of sodium carbonate or potassium carbonate for 30 seconds, excess liquid was squeezed out and dried to obtain an alkali-impregnated paper. The results of measuring the water dispersion time and air permeability of the impregnated paper are shown in Table 6.

From Table 6, it can be seen that even when no wood pulp C having the fiber dimensions and water retention of the water-dispersible fiber within the predetermined ranges is blended at all, the fibrous carboxy is similar to that obtained with the wood pulp C blended. It is understood that a water-disintegrable base material having good water dispersibility can be obtained by blending methylcellulose and treating with alkali impregnation.

[0081]

[Table 6]

[0082]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The evaluation methods used in the examples are shown below, and these were commonly used in each example.

[Water dispersion ratio] The dispersion was carried out in the same manner as in the experimental example, except that the stirring time was all 5 minutes. The water dispersion was measured for Examples 1 to 6, 9 to 11, and 13. In Examples 7, 8, 12, and 14, the water dispersibility of the test pieces was close to 100% in many cases, and a significant difference between the samples could not be evaluated. Therefore, the water dispersibility was evaluated only by the water dispersion time. .

[Water dispersion time] The dispersion was carried out in the same manner as in the experimental example. Water dispersion time was measured for all examples.

[Air permeability] The measurement was carried out in the same manner as in the experimental example.

[Smoothness] JAPAN TAPPI N
o. 5 was measured.

[Tensile strength] Measured according to JIS P8113.

[Weight loss rate by continuous rainfall test] Put the filter part of the test cigarette in a combined cycle weather meter manufactured by Suga Test Instruments Co., Ltd., spray water continuously for 30 hours, and measure the absolute dry weight. did. The weight loss rate was calculated from the following equation. Weight loss rate (%) = (converted absolute dry weight before rainfall-absolute dry weight after rainfall) 換算 converted absolute dry weight before rainfall x 100

Example 1 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.330, an L / D value of 56.8 and a water retention of 93% was beaten to a Canadian freeness of 600 ml CSF60.
Parts by weight, the 1 / D value is 0.722, and the L / D value is 79.
6. Softwood bleached kraft pulp with a water retention of 103% is beaten to a Canadian freeness of 600 ml CSF. A papermaking material consisting of 40 parts by weight is prepared, and handmade paper having a basis weight of 38 g / m ² according to JIS P8209. (Water-disintegrable base material) was produced. Next, 50 parts by weight of polyvinyl alcohol and 50 parts of starch
Parts by weight, and a coating solution having a solid concentration of 20% was applied to a single side by a roll coater at a rate of 2.5 g / m ² or 2.5 g per side.
/ M ^{2 on} both sides. Coated paper has a linear pressure of 175K
Super calendering was performed at g / cm and a temperature of 90 ° C. to produce calendered paper.

The air permeability, water dispersion rate, water dispersion time, smoothness, and tensile strength of the obtained processed paper were measured. One-side coating (Sample No. 1-1) and two-side coating (Sample N) were performed.
o. No. For each of 1-2), the air permeability is 77, 83 Coresta, and the water dispersion rate (5 minutes) is 44, 38.
%, The water dispersion time is 40 and 52 seconds, and it can be seen that a water-dispersible sheet excellent in water-dispersibility can be obtained while suppressing air permeability to a low level. The tensile strength is 3.7, 5.0K
g, the smoothness was 232, 238 seconds / 10 ml, and it had characteristics suitable as a tobacco chip base paper and a filter winding paper.

Example 2 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.420, an L / D value of 57.6 and a water retention of 77% was beaten to a Canadian freeness of 600 ml CSF.
Parts by weight, the 1 / D value is 0.722, and the L / D value is 79.
6. A papermaking raw material consisting of 20 parts by weight of a softwood bleached kraft pulp having a water retention of 103% beaten to a Canadian freeness of 600 ml CSF, and 30 parts by weight of kaolin or calcium carbonate is prepared and has a basis weight according to JIS P8209. A hand-made paper (water-disintegrable base material) of 38 g / m ² was prepared.
Next, 50 parts by weight of polyvinyl alcohol and 50 parts by weight of starch were blended, and a coating solution having a solid content of 20% was applied to one side with a roll coater at 2.5 g / m ² or 2.5 g / m ² at each side.
^Two coats were applied on both sides. Coated paper has a linear pressure of 175 kg /
Super calendering was performed at a temperature of 90 ° C. to produce calendered paper.

The resulting processed paper (sample Nos. 2-1 to 2-
Table 7 shows the results of measuring air permeability, water dispersion rate, water dispersion time, smoothness, and tensile strength for 4). Table 7
Thus, all of the samples had air permeability lower than 200 Coresta, were excellent in water dispersibility, and had characteristics such as tensile strength and smoothness suitable for tobacco chip base paper and filter winding paper.

[0093]

[Table 7]

Example 3 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.420, an L / D value of 57.6 and a water retention of 77% was beaten to a Canadian freeness of 600 ml CSF60.
Parts by weight, the 1 / D value is 0.722, and the L / D value is 79.
6. Softwood bleached kraft pulp with a water retention of 103% is beaten to a Canadian freeness of 600 ml CSF. A papermaking material consisting of 40 parts by weight is prepared, and handmade paper having a basis weight of 38 g / m ² according to JIS P8209. Was prepared.

Sodium carbonate or potassium carbonate is used as the alkaline compound. To prevent the alkaline compound from falling off after drying, carboxymethylcellulose sodium salt is added to the aqueous solution of the alkaline compound as a water-soluble polymer compatible with the aqueous solution. Was added. Alkaline compound: carboxymethylcellulose sodium salt = 3: 2 weight ratio, solids concentration 8% by weight, B
An aqueous solution having a shape viscosity of 70 CPS was impregnated with a size press to prepare an alkali-impregnated hydrolyzable substrate. The amount of the impregnated alkaline compound is 0.8 g in each case.
/ M ² .

Then, 50 parts by weight of polyvinyl alcohol and 50 parts by weight of starch were blended, and a coating solution having a solid content of 20% was impregnated with potassium carbonate using a roll coater. ^Two coated and impregnated sodium carbonate-coated papers were coated on both sides at 2.5 g / m ^{2 on} each side. Coated paper has a linear pressure of 175 Kg / cm,
Super calendering was performed at a temperature of 90 ° C. to produce calendered paper.

The resulting processed paper was measured for air permeability, water dispersion, water dispersion time, smoothness, and tensile strength. After impregnation with potassium carbonate, one-side coating (sample No. 3-
1), double-side coating after impregnation with sodium carbonate (Sample No. 3-
For each of 2), the air permeability is 46, 26 Coresta, the water dispersion rate (5 minutes) is 54, 53%, the water dispersion time is 30, 39 seconds. It can be seen that an excellent water-dispersible sheet can be obtained. The tensile strength is 3.2, 4.9 kg, and the smoothness is 2
It was 94, 390 seconds / 10 ml, and had characteristics suitable as a tobacco chip base paper and a filter winding paper.

Example 4 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.420, an L / D value of 57.6 and a water retention of 77% was beaten to a Canadian freeness of 600 ml CSF.
Parts by weight, the 1 / D value is 0.722, and the L / D value is 79.
6. A papermaking raw material comprising 20 parts by weight of a softwood bleached kraft pulp having a water retention of 103% beaten to a Canadian freeness of 600 ml CSF and 30 parts by weight of calcium carbonate was prepared, and the basis weight was 38 g / according to JIS P8209. m ²
Was made. A water-disintegrable substrate was prepared by alkali impregnation in the same manner as in Example 3, and a coating layer was formed and supercalendering was performed in the same manner as in Example 3.

The air permeability, water dispersion rate, water dispersion time, smoothness, and tensile strength of the obtained processed paper were measured. After impregnation with potassium carbonate, one-side coating (sample No. 4-
1), double-sided coating after impregnation with sodium carbonate (Sample No. 4-
For each of 2), the air permeability is 69, 23 Coresta, the water dispersion ratio (5 minutes) is 74, 83%, the water dispersion time is 9, 26 seconds. It can be seen that an excellent water dispersible sheet can be obtained. Also,
The tensile strength is 2.6, 4.0 Kg, and the smoothness is 33.
3, 298 sec / 10 ml, tobacco chip base paper,
It had suitable properties as filter wrapping paper.

Example 5 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.330, an L / D value of 56.8 and a water retention of 93% was beaten to a Canadian freeness of 600 ml CSF60.
Weight / l / D value 0.722, L / D value 79.
6. Softwood bleached kraft pulp having a water retention of 103% beaten to a Canadian freeness of 600ml CSF 40% by weight
95 parts by weight of a wood pulp raw material consisting of fibrous carboxymethylcellulose sodium salt (degree of etherification: 0.4
3) A papermaking raw material containing 5 parts by weight was prepared, and a water-disintegrable base material having a basis weight of 37 g / m ² was prepared using a fourdrinier paper machine.

Next, 50 parts by weight of polyvinyl alcohol and 50 parts by weight of starch were blended, and a coating solution having a solid concentration of 20% was applied to both sides by 2.5 g / m ² using a roll coater. The coated paper has a linear pressure of 175 Kg / cm and a temperature of 90
Super calendering was performed at ℃ to produce calendered paper.

The air permeability, water dispersion, water dispersion time, smoothness, and tensile strength of the obtained processed paper (Sample No. 5-1) were measured. The air permeability was 83 Coresta, and the water dispersion ( (5 minutes) is 40%, and the water dispersion time is 81 seconds, indicating that a water-dispersible sheet having excellent water-dispersibility can be obtained while suppressing air permeability to a low level. The tensile strength is 4.
7 kg, the smoothness was 95 seconds / 10 ml, and it had characteristics suitable for a tobacco chip base paper and a filter winding paper.

Example 6 Hardwood bleached kraft pulp having a fiber dimension 1 / D value of 0.420, an L / D value of 57.6 and a water retention of 77% was beaten to a Canadian freeness of 530 ml CSF60.
Weight / l / D value 0.722, L / D value 79.
6. Softwood bleached kraft pulp with a water retention of 103% beaten to a Canadian freeness of 530ml CSF 40% by weight
95 parts by weight of a wood pulp raw material consisting of fibrous carboxymethylcellulose sodium salt (degree of etherification: 0.4
3) A papermaking raw material containing 5 parts by weight, 30 parts by weight of calcium carbonate, and 5 parts by weight of titanium dioxide was prepared, and a water-disintegrable base material having a basis weight of 38 g / m ² was prepared using a fourdrinier paper machine.

Next, polyvinyl alcohol (PVA) and starch were blended in the respective parts by weight shown in Table 8, and a coating solution having a solid content of 20% was applied to one side with a roll coater at 2.5 g / m 2.
² or 2.5 g / m ^{2 on} each side was applied on both sides. The coated paper was further subjected to super calendering at a linear pressure of 175 kg / cm and a temperature of 90 ° C. to produce calendered paper.

The resulting processed paper (sample Nos. 6-1 to 6-
About 6), the air permeability, the water dispersion rate, the water dispersion time, the smoothness, and the tensile strength were measured and shown in Table 8. Table 8 shows that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. Also, the tensile strength and the smoothness had characteristics suitable for a tobacco chip base paper and a filter wrapping paper.

[0106]

[Table 8]

Example 7 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.480, an L / D value of 44.2 and a water retention of 109% was beaten to a Canadian freeness of 500 ml CSF5.
8 parts by weight, 1 / D value 0.722, L / D value 79.
6, 42% by weight of softwood bleached kraft pulp having a water retention of 103% beaten to a Canadian freeness of 500ml CSF, and 11 parts by weight of fibrous carboxymethyl cellulose (etherification degree 0.43) were blended to prepare a papermaking raw material. A substrate was prepared using a fourdrinier paper machine. A 5% by weight aqueous solution of sodium carbonate was applied thereto by a size press to obtain a basis weight of 41%.
A g / m ² alkali-impregnated processed water-disintegrable base material was prepared.

Next, a coating material as shown in Table 9 was applied to one or both surfaces of the water-disintegrable base material to form a water-dispersible coating layer. The coated paper has a linear pressure of 175 Kg / cm and a temperature of 90
Super calendering was performed at ℃ to produce calendered paper. The air permeability, water dispersion time, smoothness, and tensile strength of the obtained coated paper or calendered paper after coating (Sample Nos. 7-1 to 7-8) were measured, and the results are shown in Table 9.
Table 9 shows that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. In addition, it had a sufficient tensile strength, the smoothness was improved by calendering, and had properties suitable as a tobacco chip base paper and a filter winding paper.

[0109]

[Table 9]

Example 8 Hardwood bleached kraft pulp having a fiber dimension l / D value of 0.480, an L / D value of 44.2 and a water retention of 109% was beaten to a Canadian freeness of 640 ml CSF7.
5 parts by weight, 25 parts by weight of fibrous carboxymethyl cellulose (degree of etherification: 0.43), 30 parts by weight of kaolin,
A papermaking raw material containing 5 parts by weight of titanium dioxide was prepared.
Handmade paper was prepared according to IS P8209. An aqueous 8% by weight aqueous sodium carbonate solution was applied thereto by a size press to prepare an alkali-impregnated water-disintegrable substrate having a basis weight of 49 g / m ² .

Next, a coating material as shown in Table 10 was applied to one or both surfaces of the water-disintegrable substrate to form a water-dispersible coating layer. Coated paper may have a linear pressure of 175 Kg /
Super calendering was performed at a temperature of 90 ° C. to produce calendered paper.

For the obtained coated paper or calendered paper after coating (Sample Nos. 8-1 to 8-5), the air permeability,
The water dispersion time, smoothness, and tensile strength were measured and are shown in Table 10. All of these have a low air permeability of 1 Coresta and a low level usable as tobacco chip base paper and filter wrapping paper, while the water dispersion time is as short as 10 to 20 seconds.
It can be seen that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. In addition, it had a sufficient tensile strength, the smoothness was improved by calendering, and had properties suitable as a tobacco chip base paper and a filter winding paper.

[0113]

[Table 10]

Example 9 The same papermaking raw material as in Example 1 was prepared, and a water-disintegrable base material having a basis weight of 38 g / m ² was prepared using a fourdrinier paper machine. Next, a coating solution containing 70 parts by weight of kaolin, 30 parts by weight of titanium dioxide, 5.2 parts by weight of polyvinyl alcohol, and 13.8 parts by weight of starch was coated on one or both sides with a blade coater to obtain a water-insoluble powder. A water-dispersible coating layer containing the body was formed. The coated paper was further subjected to super calendering at a linear pressure of 175 kg / cm and a temperature of 90 ° C. to produce calendered paper.

For the obtained coated paper or post-coated calendered paper (Sample Nos. 9-1 to 9-4), the air permeability,
The water dispersion rate, water dispersion time, smoothness, and tensile strength were measured and are shown in Table 11. While keeping the air permeability lower than Table 11,
It can be seen that a water dispersible sheet having excellent water dispersibility can be obtained. In addition, it had a sufficient tensile strength, the smoothness was improved by calendering, and had properties suitable as a tobacco chip base paper and a filter winding paper.

[0116]

[Table 11]

Example 10 In the same manner as in Example 4, a water-disintegrable base material having a basis weight of 38 g / m ² was produced. Next, 70 parts by weight of kaolin, titanium dioxide 3
A coating solution containing 0 parts by weight and 19 parts by weight of starch was coated on one surface with a blade coater to form a water-dispersible coating layer containing a water-insoluble powder. Coated paper has a linear pressure of 175 Kg / c.
m and a temperature of 90 ° C. to perform calendering to produce calendered paper.

With respect to the obtained processed paper (Sample No. 10-1), the air permeability, the water dispersion rate, the water dispersion time, the smoothness, and the tensile strength were measured. Table 11 shows that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. Also, the tensile strength and the smoothness had characteristics suitable for a tobacco chip base paper and a filter wrapping paper.

Example 11 A water-disintegrable base material having a basis weight of 38 g / m ² was produced in the same manner as in Example 6. Next, 70 parts by weight of kaolin, titanium dioxide 3
A coating liquid containing 0 parts by weight, 13.8 parts by weight of polyvinyl alcohol, and 5.2 parts by weight of starch is coated on one or both sides with a blade coater to form a water-dispersible coating layer containing a water-insoluble powder. Formed. Coated paper has a linear pressure of 175 Kg / c.
m and a temperature of 90 ° C. to perform calendering to produce calendered paper.

The obtained processed paper (sample No. 11-1, 1)
About 1-2), the air permeability, the water dispersion rate, the water dispersion time, the smoothness, and the tensile strength were measured and shown in Table 11. Table 11 shows that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. Also, the tensile strength and the smoothness had characteristics suitable for a tobacco chip base paper and a filter wrapping paper.

Example 12 Softwood bleached kraft pulp having a fiber dimension l / D value of 0.722, an L / D value of 79.6 and a water retention of 103% was beaten to a Canadian freeness of 500 ml CSF.
0 parts by weight, 1 / D value 0.480, L / D value 44.
2. A bleached kraft pulp with a water retention of 109% beaten to a Canadian freeness of 500 ml CSF, 60 parts by weight, 10 parts by weight of fibrous carboxymethylcellulose (etherification degree 0.43), 30 parts by weight of kaolin, titanium dioxide A papermaking raw material containing 5 parts by weight was prepared and JIS P
Hand-made paper was prepared according to 8209. A 5% by weight aqueous solution of sodium carbonate containing 30% by weight of methanol was applied thereto by a size press to prepare an alkali-impregnated hydrolyzable base material having a basis weight of 38 g / m ² .

Next, a coating solution containing 70 parts by weight of kaolin, 30 parts by weight of titanium dioxide, and 19 parts by weight of starch was applied on one side with a blade coater to form a water-dispersible coating layer containing a water-insoluble powder. Was formed. Coated paper has a linear pressure of 175 kg /
Super calendering was performed at a temperature of 90 ° C. to produce calendered paper.

The resulting processed paper (Sample No. 12-1) was measured for air permeability, water dispersion ratio, water dispersion time, smoothness, and tensile strength. Table 11 shows that a water-dispersible sheet having excellent water-dispersibility can be obtained while keeping the air permeability low. Also, the tensile strength and the smoothness had characteristics suitable for a tobacco chip base paper and a filter wrapping paper.

Example 13 In the same manner as in Example 6, a water-decomposable base material having a basis weight of 38 g / m ² was produced. Next, 70 parts by weight of kaolin, titanium dioxide 3
A coating liquid containing 0 parts by weight, 13.8 parts by weight of polyvinyl alcohol, and 5.2 parts by weight of starch was coated on one side with a blade coater at 4.7 g / m ² to obtain a water-dispersible powder containing water-insoluble powder. A coating layer was formed. On the other surface, a coating liquid containing 40 parts by weight of polyvinyl alcohol and 60 parts by weight of starch was coated with a blade coater at 3.7 g / m ² to form a water-dispersible coating layer containing no water-insoluble powder. Formed. This double-side coated paper was further subjected to super calendering at a linear pressure of 175 Kg / cm and a temperature of 90 ° C. to produce calendered paper.

The obtained processed paper (sample No. 13-1)
Has an air permeability of 66 Coresta, an opacity of 71.6%, a water dispersion time of 33 seconds, a smoothness of 323 seconds / 10 ml, and a tensile strength of 4.68 Kg, and has properties suitable as tobacco chip base paper and filter winding paper. Had.

Example 14 An alkali-impregnated water-disintegrable base material having a basis weight of 41 g / m ² was produced in the same manner as in Example 7. Next, a coating solution containing 70 parts by weight of kaolin, 30 parts by weight of titanium dioxide, and 19 parts by weight of starch was coated on one side with a blade coater at a rate of 10 g / m ² to form a water-dispersible coating containing water-insoluble powder. A layer was formed.
On the other side, acrylic ester / acrylic acid copolymer 4
A coating liquid containing 5 parts by weight and 55 parts by weight of polyvinyl alcohol was coated with a blade coater at 10.7 g / m ² to form a water-dispersible coating layer containing no water-insoluble powder. This double-side coated paper was further subjected to super calendering at a linear pressure of 175 Kg / cm and a temperature of 90 ° C. to produce calendered paper.

Obtained processed paper (Sample No. 14-1)
Had an air permeability of 280 seconds / 100 ml, an extremely low air permeability, and an extremely short water dispersion time of 11 seconds. Further, the smoothness was 320 seconds / 10 ml, and the tensile strength was 2.61.
Kg, and had suitable properties as tobacco chip base paper and filter winding paper.

Example 15 (Example of Tobacco) 11-2 (air permeability: 86 Coresta) was used as chip base paper, a picture pattern was printed on the base paper, and cut into standard size widths to obtain chip paper (sample No.
15).

Further, the sample No. 11
-2 The sheet not subjected to the super calendering was prepared. The air permeability of this sheet was 188 Coresta, and it was made into chip paper in the same manner as described above (Sample No. 1).
6).

Further, as a sheet having a high air permeability outside the present invention, the water-disintegrable substrate in Example 11 was subjected to supercalendering at a linear pressure of 175 kg / cm and a temperature of 90 ° C. I got The air permeability of this processed paper was 270 Coresta, and a chip paper for comparison was produced in the same manner as described above (Sample No. 17).

On the other hand, bleached hardwood kraft pulp having an L / D value of 0.420, an L / D value of 57.6 and a water retention of 77% in the fiber dimension was prepared using a Canadian freeness of 240 ml CSF.
80% by weight beaten to 1 / D value of 0.72
2. A softwood bleached kraft pulp having an L / D value of 79.6 and a water retention of 103% beaten to a Canadian freeness of 240 ml CSF 95% by weight of a wood pulp raw material composed of 20% by weight, and fibrous carboxymethylcellulose sodium salt are added. (Degree of etherification 0.43) 5 parts by weight, calcium carbonate 6
A papermaking raw material containing 5 parts by weight was prepared, and a water-disintegrable base material having a basis weight of 30 g / m ² was prepared using a fourdrinier paper machine. Next, a starch coating solution having a solid content of 20% was applied on one side with a roll coater.
g / m ^{2 on} both sides and a linear pressure of 175 Kg / c
m, at a temperature of 90 ° C. to obtain a calendered paper. The air permeability of this processed paper was 109 Coresta, which was cut into a predetermined size to obtain a filter wrapping paper (Sample No. 18).

As a comparative sample, tobacco was produced from chip paper and filter wrapping paper made under general papermaking conditions as follows. That is, the l / D value of the fiber dimension is 0.530, and the L / D value is 55.
3. Hardwood bleached kraft pulp with a water retention of 116% beaten to a Canadian freeness of 80ml CSF 50% by weight
Wood pulp raw material comprising 50% by weight of a softwood bleached kraft pulp having an L / D value of 0.786, an L / D value of 77.6, and a water retention of 91.5%, which is beaten to a Canadian freeness of 80 ml CSF A papermaking raw material prepared by internally adding 30 parts by weight of calcium carbonate to 100 parts by weight was prepared, and a base paper for chip paper having a basis weight of 37 g / m ² and a basis weight of 27 g /
An m ² filter wrapping base paper was prepared. For each of these, a line pressure of 175K was applied without surface coating.
g / cm, super calendering at 90 ° C,
A calendered paper was obtained. The air permeability was 5 Coresta for tip paper and 9 Coresta for filter wrapping paper. Each was cut to a predetermined size to obtain a comparative chip paper (sample No. 19) and a comparative filter wrapping paper (sample No. 20).

Filter wrapping paper (sample No. 18, 2
In 0), an acetate tow was rolled up in the same manner as a normal tobacco filter to produce a tobacco filter. At this time, no mechanical or quality problems occurred.

Table 12 shows the prepared tobacco filter and a portion obtained by winding the same tobacco cut with tobacco wrapping paper.
Chip paper (sample Nos. 15, 16, 17,
Fourteen kinds of tobaccos were trial manufactured in combination with 19). At the time of trial production of any of the tobacco samples, mechanical problems and quality problems other than the components in the smoke did not occur and were good. For these tobaccos, the results of measurement of the tobacco ventilation resistance, the amount of tar in smoke, the amount of nicotine in smoke, and the number of times of smoking were measured according to the TIOJ (Japan Tobacco Association) method, and the results were measured by a continuous rainfall test using a combined cycle weather meter. Table 12 also shows data comparing the reduction rates of the tip paper and the filter paper after the lapse of time.

[0135]

[Table 12]

The prototype No. to be compared was used. A based on the tobacco of No. A The tobaccos B and C have characteristics suitable for use as tobacco materials because the reduction rate by the combined cycle weather meter is high and the water dispersibility is good, and the reduction of components in smoke hardly occurs. It can be said that there is. Trial No. Regarding tobacco D, it was recognized that the values of nicotine and tar significantly decreased. Therefore, the trial production No. When the air permeability of the paper exceeds 200 Coresta as in D, it can be said that the paper is not suitable for use as chip paper because the amount of components in the smoke such as nicotine and tar in the smoke is considerably reduced.

[0137]

According to the present invention, a water dispersion for tobacco which is easily decomposed by rainwater or the like while maintaining the same air permeability as filter wrapping paper or chip paper used in a filter portion of a conventional cigarette. An opaque sheet is obtained.
Therefore, in a cigarette using a filter wrapping paper or chip paper made from this sheet, the discarded butts are easily decomposed by rainwater or the like, which is useful for environmental preservation and beautification.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Susumu Minamizawa 1-17-7 Yokokawa, Sumida-ku, Tokyo Japan Tobacco Inc. (58) Field surveyed (Int.Cl. ⁶ , DB name) D21H 27/00

Claims (13)

(57) [Claims] 1. The 1 / D value is 0.45 or less and the L / D value is 6
A water-soluble polymer is formed on at least one surface of a water-disintegrable base material prepared from a papermaking fiber raw material having a fiber dimension of 0 or less and a water retention of 95% or less and containing 20% by weight or more of a water-dispersible fiber. And a water-dispersible coating layer made of the following, and the air permeability was measured with a paper air permeability manual measuring instrument at an air permeability of 200 Coresta or less or with an Oken-type air permeability tester from 0 to 50,000 sec / 10.
A water-dispersible sheet for tobacco, characterized in that it is regulated to have an air permeability of 0 ml. 2. The 1 / D value is 0.45 or less and the L / D value is 6
A water-disintegrable base material obtained by mixing a water-insoluble or poorly water-soluble powder with a papermaking fiber raw material having a fiber dimension of 0 or less and a water retention of 95% or less and containing 20% by weight or more of a water-dispersible fiber. On at least one side, a water-dispersible coating layer made of a water-soluble polymer was provided, and the air permeability was 200 Coresta or less with a paper air permeability manual measuring device or 0 to 50,000 seconds with an Oken type air permeability tester. A water-dispersible sheet for tobacco, characterized in that the sheet is regulated to have an air permeability in the range of / 100 ml. 3. An L / D value of 0.45 or less and an L / D value of 6
At least one surface of a water-disintegrable substrate obtained by forming a papermaking fiber raw material having a fiber dimension of 0 or less and having a water retention of 95% or less and containing 20% by weight or more of a water-dispersible fiber and then subjecting the raw material to alkali impregnation. , A water-dispersible coating layer made of a water-soluble polymer was provided, and the air permeability was measured using a paper air permeability manual measurement device.
Air permeability less than 0 Coresta or 0 with Oken type air permeability tester
A water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in a range of from 50,000 seconds / 100 ml. 4. An L / D value of not more than 0.45 and an L / D value of 6
It is obtained by mixing a water-insoluble or poorly water-soluble powder with a papermaking fiber raw material having a fiber dimension of 0 or less and a water retention of 95% or less and containing 20% by weight or more of a water-dispersible fiber, followed by alkali impregnation. A water-dispersible coating layer made of a water-soluble polymer is provided on at least one side of the water-decomposable base material, and the air permeability is measured with a paper air permeability manual measurement device at an air permeability of 200 Coresta or less or an Oken-type air permeability tester. 0 to 50,000 seconds / 10
A water-dispersible sheet for tobacco, characterized in that it is regulated to have an air permeability of 0 ml. 5. An L / D value of 0.45 or less and an L / D value of 6
Hydrolysis by mixing a fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt with a papermaking fiber raw material having a fiber dimension of 0 or less and a water retention of 95% or less and containing 20% by weight or more of water-dispersible fibers. A water-dispersible coating layer made of a water-soluble polymer is provided on at least one surface of the conductive base material, and the air permeability is measured with a paper air permeability manual measurement device using a gas permeability of 200 Coresta or less or an Oken-type air permeability tester. A water-dispersible sheet for tobacco, wherein the air permeability is regulated so as to be in the range of 0 to 50,000 seconds / 100 ml. 6. An L / D value of 0.45 or less and an L / D value of 6
A fibrous carboxymethylcellulose salt or a fibrous carboxyethylcellulose salt and a water-insoluble or water-poor water-soluble fiber material having a fiber dimension of 0 or less and a water retention of 95% or less and containing 20% by weight or more of water-dispersible fibers. A water-dispersible coating layer made of a water-soluble polymer is provided on at least one surface of the water-disintegrable base material obtained by mixing the soluble powder, and the air permeability of the paper air permeability manual measurement device is 200 Coresta or less. A water dispersible sheet for tobacco, wherein the air permeability is regulated to be in the range of 0 to 50,000 seconds / 100 ml with an Oken-type air permeability tester. 7. A water-soluble polymer on at least one surface of a water-decomposable base material obtained by forming a papermaking fiber material containing water-dispersible fibers and fibrous carboxymethylcellulose or fibrous carboxyethylcellulose and then subjecting the raw material to alkali impregnation. Provided with a water-dispersible coating layer having a permeability of 200 Coresta or less with a paper air permeability manual measuring device or a gas permeability of 0 to 50,000 seconds / 100 ml with an Oken type air permeability tester. A water-dispersible sheet for tobacco, characterized in that the sheet is regulated to be as follows. 8. A water-disintegrable base material obtained by mixing a water-insoluble or sparingly water-soluble powder with a papermaking fiber material containing water-dispersible fibers and fibrous carboxymethylcellulose or fibrous carboxyethylcellulose and then subjecting the mixture to alkali impregnation. On one surface, a water-dispersible coating layer made of a water-soluble polymer was provided, and the air permeability was measured using a paper air permeability manual measurement device.
A water-dispersible sheet for tobacco, which is regulated so as to have an air permeability in the range of 00 seconds / 100 ml. 9. The water-dispersible coating layer comprising a water-soluble polymer contains 20 parts by weight or less of a water-insoluble or poorly water-soluble powder per 1 part by weight of a water-soluble polymer. 9. The water-dispersible sheet for tobacco according to any one of 1 to 8. 10. The water-dispersible sheet for cigarettes according to claim 1, wherein a water-dispersible coating layer is provided on both surfaces of the water-disintegrable base material. 11. A water-dispersible coating layer comprising only a water-soluble polymer is provided on one surface of a water-decomposable substrate, and a water-insoluble or hardly water-soluble powder is used on the other surface with respect to 1 part by weight of a water-soluble polymer. Body 20
The water-dispersible sheet for tobacco according to any one of claims 1 to 8, further comprising a water-dispersible coating layer containing not more than parts by weight. 12. A tobacco characterized by using the water-dispersible sheet for tobacco according to claim 1 as a filter wrapping paper. 13. A tobacco, characterized in that the tobacco water-dispersible sheet according to claim 1 is used as chip paper.